# Attack surface management for enterprise buyers: what AI models recommend, October 2026

Gane Index, October 2026 Edition. Asked as "attack surface management platform" and as "external attack surface monitoring tool", six framings each, to fourteen models with search on, on behalf of an enterprise B2B company. Page: https://www.gane.ai/index/it/security/attack-surface-management/2026-10/enterprise

This is the permanent record of the October 2026 Edition, published October 1, 2026 and superseded since. The current standing: https://www.gane.ai/index/it/security/attack-surface-management/enterprise/index.md

**Standing:** Cortex Xpanse leads with 29% of first choices; verdict contested. 55 first choices across the direct, paraphrase, budget and scale prompts.

## First-choice share

| Rank | Product | Share | Negative rate | Labels |
|---|---|---|---|---|
| 1 | [Cortex Xpanse](https://www.gane.ai/index/it/vendors/cortex-xpanse/index.md) | 29% | 15% | 53 |
| 2 | [Microsoft Defender External Attack Surface Management](https://www.gane.ai/index/it/vendors/microsoft-defender-external-attack-surface-management/index.md) | 16% | 19% | 47 |
| 3 | [CyCognito](https://www.gane.ai/index/it/vendors/cycognito/index.md) | 7% | 21% | 39 |
| 4 | [Bitsight](https://www.gane.ai/index/it/vendors/bitsight/index.md) | 7% | 16% | 25 |
| 5 | [Tenable Attack Surface Management](https://www.gane.ai/index/it/vendors/tenable-attack-surface-management/index.md) | 5% | 12% | 33 |
| 6 | [CrowdStrike Falcon Surface](https://www.gane.ai/index/it/vendors/crowdstrike-falcon-surface/index.md) | 4% | 5% | 19 |
| 7 | [Wiz](https://www.gane.ai/index/it/vendors/wiz/index.md) | 4% | 13% | 15 |
| 9 | [CrowdStrike Falcon Exposure Management](https://www.gane.ai/index/it/vendors/crowdstrike-falcon-exposure-management/index.md) | 2% | 10% | 10 |
| 11 | [Qualys External Attack Surface Management](https://www.gane.ai/index/it/vendors/qualys-external-attack-surface-management/index.md) | 2% | 25% | 12 |
| 87 | [Censys ASM](https://www.gane.ai/index/it/vendors/censys-asm/index.md) | 0% | 61% | 18 |

Rank is by share of first choices among all 87 products named; products with the same share are tied, and the order among them carries no meaning. The table lists those with at least 10 labels.

## Each model's first choice on the direct prompt

- Claude Haiku 4.5: Bitsight; alternatives Cortex Xpanse, CyCognito
- GPT-5.4 mini: Cortex Xpanse; alternatives CrowdStrike Falcon Exposure Management, Microsoft Defender External Attack Surface Management, Tenable Attack Surface Management
- Gemini 3.5 Flash: Cortex Xpanse, CyCognito; alternatives CrowdStrike Falcon Exposure Management, Microsoft Defender External Attack Surface Management, Synack, Wiz
- Perplexity Sonar: Cortex Xpanse; alternatives Bitsight, Tenable Attack Surface Management
- Grok 4.20: Rapid7, Tenable Attack Surface Management; alternatives Cortex Xpanse, CrowdStrike
- Mistral Small: IBM Randori, Wiz; alternatives CTM360, Microsoft Defender External Attack Surface Management
- DeepSeek V4 Flash: Cortex Xpanse, Tenable Attack Surface Management; alternatives CrowdStrike Falcon Surface, CyCognito, Microsoft Defender External Attack Surface Management, Qualys External Attack Surface Management
- Llama 4 Maverick: Bitsight; alternatives Cortex Xpanse, CrowdStrike Falcon, Synack
- Qwen 3.7 Flash: Cortex Xpanse; alternatives Bitsight, CyCognito, IBM, Mandiant Advantage
- Kimi K2: Cortex Xpanse, CyCognito; alternatives Attaxion, IONIX, Synack
- GLM 4.7 FlashX: Wiz; alternatives ReliaQuest GreyMatter, Synack
- MiniMax M2.5: Cortex Xpanse; alternatives Bitsight, CTM360, CyCognito, Recorded Future
- GPT-6 Luna: Cortex Xpanse; alternatives CrowdStrike Falcon Surface, Microsoft Defender External Attack Surface Management, Tenable Attack Surface Management
- Muse Glimmer 30B: Cortex Xpanse, Qualys CyberSecurity Asset Management; alternatives CrowdStrike Falcon Exposure Management, CrowdStrike Falcon Surface, Microsoft Defender External Attack Surface Management

## Sources the answers cite

81 of 84 answers came back with a source list, from 14 of 14 models. Sites named in the most answers:

- paloaltonetworks.com: 48 answers, 66 citations
- synack.com: 39 answers, 43 citations
- wiz.io: 31 answers, 38 citations
- guideflow.com: 31 answers, 31 citations
- bitsight.com: 28 answers, 44 citations
- upguard.com: 28 answers, 35 citations
- esecurityplanet.com: 26 answers, 26 citations
- gartner.com: 24 answers, 33 citations

Pages named in the most answers:

- https://synack.com/blog/best-attack-surface-management-tools (39 answers)
- https://paloaltonetworks.com/cyberpedia/asm-tools-comparison (36 answers)
- https://guideflow.com/blog/attack-surface-management-software (31 answers)
- https://esecurityplanet.com/networks/attack-surface-management-tools (26 answers)
- https://wiz.io/academy/cloud-security/attack-surface-management-tools (22 answers)
- https://bitsight.com/guides/best-external-attack-surface-management-platforms-for-global-enterprises (22 answers)
- https://atlassystems.com/blog/attack-surface-management-tools (20 answers)
- https://upguard.com/blog/best-attack-surface-management-software-solutions (20 answers)
- https://breachsense.com/blog/attack-surface-management-tools (19 answers)
- https://attaxion.com/top-external-attack-surface-management-vendors (17 answers)

## Warned against

- Censys ASM: 11 of 18 labels negative. "Avoid "discovery-only" tools like basic Censys implementations—demand exploitability validation" (Kimi K2, negative prompt)
- CyCognito: 8 of 39 labels negative. "Avoid: Purely custom-quote models (e.g., CyCognito)" (Mistral Small, budget prompt)
- Cortex Xpanse: 8 of 53 labels negative. "Products such as Microsoft Defender EASM and Palo Alto Cortex Xpanse focus on discovering internet-facing assets... EASM is only a subset of ASM" (GPT-6 Luna, negative prompt)
- Microsoft Defender External Attack Surface Management: 9 of 47 labels negative. "High Risk. Large enterprises ... Your monthly bill can fluctuate wildly and unpredictably." (Gemini 3.5 Flash, budget prompt)

## Movement since September 2026

Floor: 11 points of share, measured on the calibration repeat.
New leader: Microsoft Defender External Attack Surface Management (21%) to Cortex Xpanse (28%). Margin 11 points, beyond the floor.

- Cortex Xpanse: 16% to 28%, +12. Cleared the floor by 1 point · rank 3 → 1 of 80.
- Bitsight: 21% to 9%, −12. Cleared the floor by 1 point · rank 2 → 3 of 80.
- Tenable Attack Surface Management: 2% to 7%, +5. Inside the floor by 6 points · rank 8 → 4 of 80.
- Microsoft Defender External Attack Surface Management: 21% to 17%, −4. Inside the floor by 7 points · rank 1 → 2 of 80.
- CrowdStrike Falcon Exposure Management: 5% to 2%, −3. Inside the floor by 8 points · rank 5 → 8 of 80.
- CyCognito: 9% to 7%, −2. Inside the floor by 9 points · rank 4 → 5 of 80.
- Wiz: 2% to 4%, +2. Inside the floor by 9 points · rank 10 → 7 of 80.
- IBM Randori: 0% to 2%, +2. Inside the floor by 9 points · rank 17 → 10 of 80.
- IONIX: 2% to 0%, −2. Inside the floor by 9 points · rank 9 → 20 of 80.
- CrowdStrike Falcon Surface: 5% to 4%, −1. Inside the floor by 10 points · rank 6 of 80, unchanged.
- Synack: 0% to 0%, ±0. Inside the floor by 11 points · rank 16 → 19 of 80.
- Qualys External Attack Surface Management: 0% to 0%, ±0. Inside the floor by 11 points · rank 18 → 21 of 80.

## Record

- Method: https://www.gane.ai/index/it/methodology
- License: CC BY 4.0. Cite as Gane Index, October 2026 Edition, www.gane.ai/index/it.